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For $=100$ and ro $=100$k $,$ contrast the Wilson mirror and the simple mirror by evaluating the transfer$-$ratio error due to finite $,$ and the output resistance.

Ans. Transfer$-$ratio error: $0\mathrm{.}02\%$ for Wilson as opposed to $2\%$ for the simple circuit; Ro $=5$Mohm for Wilson compared to $100$ k for the simple circuit